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Veneneia
Veneneia is the second-largest impact crater on asteroid 4 Vesta, at 52°S latitude. 'Vesta seems more planet than asteroid' ''Science News'', 2012 Mar 22 in diameter, it is 70% of the equatorial diameter of the asteroid, and one of the largest craters in the Solar System. It is at least 2 billion years old, and possibly as old as 4.2 billion years. However, it is overlain and partially obliterated by the even larger Rheasilvia. It was discovered by the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4 Vesta
Vesta (minor-planet designation: 4 Vesta) is one of the largest objects in the asteroid belt, with a mean diameter of . It was discovered by the German astronomer Heinrich Wilhelm Matthias Olbers on 29 March 1807 and is named after Vesta (mythology), Vesta, the virgin goddess of home and hearth from Roman mythology. Vesta is thought to be the second-largest asteroid, both by mass and by volume, after the dwarf planet Ceres (dwarf planet), Ceres. Measurements give it a nominal volume only slightly larger than that of 2 Pallas, Pallas (about 5% greater), but it is 25% to 30% more massive. It constitutes an estimated 9% of the mass of the asteroid belt. Vesta is the only known remaining rocky protoplanet of the kind that formed the terrestrial planets. Numerous fragments of Vesta were ejected by collisions one and two billion years ago that left two enormous craters occupying much of Vesta's southern hemisphere. Debris from these events has fallen to Earth as HED meteorite, howardi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rheasilvia
Rheasilvia is the largest impact crater on the asteroid Vesta. It is in diameter, which is 90% the diameter of Vesta itself, and is 95% the mean diameter of Vesta, . However, the mean is affected by the crater itself. It is 89% the mean equatorial diameter of , making it one of the largest craters in the Solar System, and at 75°S latitude, covers most of the southern hemisphere. The peak in the center of the crater is in diameter, and rises from its base, making it one of the tallest mountains known in the Solar System. Observation and naming Rheasilvia was discovered in Hubble Space Telescope images in 1997, but was not named until the arrival of the ''Dawn'' spacecraft in 2011. It is named after Rhea Silvia, a mythological vestal virgin and mother of the founders of Rome, Romulus and Remus. The name ''Rheasilvia'' was officially approved by the International Astronomical Union (IAU) on 30 September 2011.(NASA coordinates) Characteristics The crater partially obsc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saturnalia Fossae
Saturnalia Fossae is a series of parallel Veneneian troughs in the northern hemisphere of the giant asteroid 4 Vesta. It is thought to be a shock fractures resulting from the impact that created Veneneia crater, which it is concentric with. It is one of the longer chasms in the Solar System. Observation and naming Saturnalia Fossae, as with most Vestian features, was first observed upon the arrival of the ''Dawn'' orbiter in July 2011. Initially, only the largest and most prominent trough was named, then called ''Saturnalia Fossa''. Later, the name came to encompass all troughs in the network, with the largest trough later being designated ''Saturnalia Fossa A''. The trough system is named after the Roman festival of Saturnalia; the name ''Saturnalia Fossae'' was officially approved by the International Astronomical Union (IAU) on 27 December 2011. Geology and characteristics Saturnalia Fossae is located in Vesta's northern hemisphere. It is one of two major trough syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Largest Craters In The Solar System
Following are the largest impact craters on various worlds of the Solar System. For a full list of named craters, ''see List of craters in the Solar System''. The ratio column compares the crater diameter with the diameter of the impacted celestial body. The maximum crater diameter is 157% of the body diameter (the circumference along a great circle). See also * List of Solar System extremes ** List of largest lakes and seas in the Solar System ** List of largest rifts and valleys in the Solar System ** List of tallest mountains in the Solar System This is a list of the tallest mountains in the Solar System. This list includes peaks on all celestial bodies where significant mountains have been detected. For some celestial bodies, different peaks are given across different types of measurem ... References {{Solar System table * Solar System Craters, largest in the Solar System Craters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dawn (spacecraft)
''Dawn'' is a retired space probe that was launched by NASA in September 2007 with the mission of studying two of the three known protoplanets of the asteroid belt: Vesta and Ceres. In the fulfillment of that mission—the ninth in NASA's Discovery Program—''Dawn'' entered orbit around Vesta on July 16, 2011, and completed a 14-month survey mission before leaving for Ceres in late 2012. It entered orbit around Ceres on March 6, 2015. In 2017, NASA announced that the planned nine-year mission would be extended until the probe's hydrazine fuel supply was depleted. On November 1, 2018, NASA announced that ''Dawn'' had depleted its hydrazine, and the mission was ended. The derelict probe remains in a stable orbit around Ceres. ''Dawn'' is the first spacecraft to have orbited two extraterrestrial bodies, the first spacecraft to have visited either Vesta or Ceres, and the first to have orbited a dwarf planet. The ''Dawn'' mission was managed by NASA's Jet Propulsion Laboratory, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vestal Virgin
In ancient Rome, the Vestal Virgins or Vestals (, singular ) were priestesses of Vesta, virgin goddess of Rome's sacred hearth and its flame. The Vestals were unlike any other public priesthood. They were chosen before puberty from several suitable candidates, freed from any legal ties and obligations to their birth family, and enrolled in Vesta's priestly college of six priestesses. They were supervised by a senior vestal but chosen and governed by Rome's leading male priest, the -- in the Imperial era, this meant the emperor. Vesta's acolytes vowed to serve her for at least thirty years, study and practise her rites in service of the Roman State, and maintain their chastity throughout. In addition to their obligations on behalf of Rome, Vestals had extraordinary rights and privileges, some of which were granted to no others, male or female. The Vestals took turns to supervise Vesta's sacred hearth so that at least one Vestal was stationed there at all times. Vestals who ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impact Crater
An impact crater is a depression (geology), depression in the surface of a solid astronomical body formed by the hypervelocity impact event, impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters typically have raised rims and floors that are lower in elevation than the surrounding terrain. Impact craters are typically circular, though they can be elliptical in shape or even irregular due to events such as landslides. Impact craters range in size from microscopic craters seen on lunar rocks returned by the Apollo Program to simple bowl-shaped depressions and vast, complex, multi-ringed impact basins. Meteor Crater is a well-known example of a small impact crater on Earth. Impact craters are the dominant geographic features on many solid Solar System objects including the Moon, Mercury (planet), Mercury, Callisto (moon), Callisto, Ganymede (moon), Ganymede, and most small moons and asteroids. On other planet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impact Craters On Asteroids
Impact may refer to: * Impact (mechanics), a large force or mechanical shock over a short period of time * Impact, Texas, a town in Taylor County, Texas, US Science and technology * Impact crater, a meteor crater caused by an impact event * Impact event, the collision of a meteoroid, asteroid or comet with Earth * Impact factor, a measure of the citations to a science or social science journal * Impact wrench, a socket wrench power tool capable of high torque Books and magazines * ''Impact'' (novel), a 2010 novel by Douglas Preston *'' Impact Press'', a former Orlando, Florida-based magazine * Impact Magazines, a former UK magazine publisher * ''Impact'' (conservative magazine), a British political magazine * ''Impact'' (British magazine), a British action film magazine * ''Impact'', a French action film magazine spun off from ''Mad Movies'' * ''Impact'' (UNESCO magazine), a former UNESCO quarterly titled ''IMPACT of science on society'' * ''Impact'' (student magazine), a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
